Description of problem:
when quick install in pre-existing env, it will detected the installed host and give an hint for choice about add node or reinstall. but press "enter" directly for default, it will not go to the step for add node.

Version-Release number of selected component (if applicable):
atomic-openshift-utils-3.3.11-1.git.4.eac15df.el7.noarch

How reproducible:
always

Steps to Reproduce:
prepare an host which has been installed ose(eg.xxx)
1.run atomic-openshift-installer install
2.according to the guide, enter the hostname or ip of xxx(Only existing hosts input in the beginning) 
3.it will gathering info from hosts and then give an guide as follows:
Installed environment detected.
By default the installer only adds new nodes to an installed environment.
Do you want to (1) only add additional nodes or (2) reinstall the existing hosts potentially erasing any custom changes?: 
4."enter" directly

Actual results:
it will still give the same info as above.
Do you want to (1) only add additional nodes or (2) reinstall the existing hosts potentially erasing any custom changes?: 
Do you want to (1) only add additional nodes or (2) reinstall the existing hosts potentially erasing any custom changes?: 
Do you want to (1) only add additional nodes or (2) reinstall the existing hosts potentially erasing any custom changes?: 

Expected results:
go to "adds new nodes" as its hint says "By default the installer only adds new nodes to an installed

Additional info: